Metal swaging machine



March 20, 1934. J PRACNY 1,951,738

METAL SWAGING MACHINE Filed June 18, 1932 3 Sheets-Sheet l March 20, 1934. J, E Q Y 1,951,738

METAL SWAGING MACHINE Filed June 18, 1932 3 Sheets-Sheet 2 LW A March 20, 1934. J. E. PRACNY METAL SWAGING MACHINE 3 Sheets-Sheet 3 Filed June 18, 1932 I Patented Mar. 20, 1934 UNETED STATES PATENT OFFICE METAL SWAGI NG MACHINE Application June is, 1932. sci-mm. 611,912

10 Claims. 29-34) This invention relates to machines designed to by punches and dies simultaneously swage heads upon the opposite ends of metal blanks such, for example, as the spokes used in wire wheels.-

The object of the invention is to simplify the mechanism for manipulating the stock in machines of this class so that the blanks can be rapidly formed to accurate size and shape.

In the embodiment of the invention illustrated a continuous length of wire of the required cali bar is fed by common feeding mechanism at one side of the machine so that it passes in at substantially right angles to the line of movement of the punches which engagethe opposite ends of the stock and in cooperation with the dies form the heads thereon. The stock is fed against a stop and the required length is cut off by an oscillatory shear which is pivoted on the' top of the machine. The severed piece is deposited in a groove in a carrier that is fixed to a vertical arbor. The carrier is rotated in a horizontal plane 90 and stops with the blank extending parallel with and above the opening between the dies. As it is rotated the forward end of the blank engages a fixed cam and is pushed back slightly thereby so the blank will be located centrally above the dies, the blank when first placed projecting a little further in front than in back of the carrier; As the blank reaches a position above and parallel with the punches and dies the oscillatory carrier dwells and fingers move vertically downward grasp the blank, pick it up and while the carrier returns, the fingers move down and deposit the blank between the separated dies.. When the dies are closed and the blank is gripped the fingers return and the punches move inward and swage the ends of the blank. The dies are opened and closed, and the punches are carried forward and back by the mechanisms employed in the common header, which actuating mechanisms are not illustrated as they are well known to those skilled in the header art.

Fig. 1 of the accompanying drawings is a. plan view of the essential elements of the mechanisms which embody this invention, showing a length of stock fed in from the side of the machine.

Fig. 2 is an elevation of the parts illustrated in Fig. 1, looking toward the feed, the oscillatory transfer carrier, the vertical transfer fingers and the ends of the closed dies.

Fig. 3 is a plan showing the oscillatory carrier in position to receive a length of severed stock.

Fig. 4 is a plan showing the carrier turned and holding the piece of stock above the dies.

Fig. 5 is a vertical section, showing in eieva tion the end of the cutter, the carrier in initial position, and a blank in the dies with its ends engaged by the punches.

Fig. 6 shows a transverse section of the opened dies, and the carrier in its second position.

Fig. 7 is a perspective view of one of the die blocks and the dies it carries.

Fig. 8 is a front elevation of the vertical transfer finger slide and fingers holding a length of stock, the cutter and the end of the carrier in initial position.

Fig. 9 is an enlarged view showing the relation of the cutter blade and the carrier with the finger mechanism which retains the stock in the car ner.

Fig. 10 is a top view of the means for tripping the retaining finger shown in Fig. 9.v

Fig. 11 is a plan of the finger latch shown in Fig. 9.

In the machine illustrated the wire or rod of stock 1 is fed from one side by feed rolls 2 which are rotated by the usual mechanism at the proper times. The length of stock fed into the machine is gauged by the engagement of its end with a stop pin 3, Figs. 1, 2. The fed stock is then severed by a cutter blade 4 that is fastened to the short end of a lever 5 which is pivoted between ears 6 extending upward from the top of the machine frame, Figs. 5, 8. The long end of the cutter lever is connected by a link 7 with the end of a lever 8 that has a roll 9 engaged by a cam 10 on a counter shaft 11 of the machine, Fig. 8, go the cam being shaped to sever a piece of stock after each feed.

In the particular arrangement shown the severed piece of stock is allowed to drop into grooves 12 in the arms 13 of the carrier 14, Figs. 3-5.

The carrier is mounted so that it may be oscillated horizontally on a vertical stud 15 fixed to the frame, Figs. 3-6. The carrier has a projecting fork 16 that is engaged by a roll 17 at the end of a horizontally movable slide 18. A block 19 attached to the slide is engaged by the fork 10 of a lever 20- that has arms 21 to which a link 22 is 'jointed, the link being actuated at the proper tends to press the hooked end of this finger over the piece of stock in the groove 12 of the carrier. A latch 26 pivoted on the frame is arranged to engage with the lower end of the finger and withdraw the hooked end of the finger. The latch has an arm 27 upon which'presses the end of a spring 28 that tends to hold the latch up in engagement with the finger, Figs. 9-11. The arm 27 is loosely connected with a rocker 29 by a rod 30 on which, between the arm and rocker, is a spring 31. The rocker 29 is pivoted on a stud 32 supported by the machine frame and it has a lug 33 extending from one side, Fig. 9. Attached to the end of the cutter lever 5 is a block 34 with a trip finger 35 that is adapted to engage with the lug 33 on the rocker. As the cutter is forced down to sever a piece of stock the finger 35 engages and turns the rocker 29, which compressing the spring 31, causes the latch 26 to hold the finger 23 so that the severed piece of stock may drop into the groove 12 of the carrier 14. As the finger 35 passes the lug 33 the rocker is returned by the spring 31-and the latch 26 oscillated so as to release the finger 23 and allow its hooked end to swing over and retain the stock in the carrier groove while the stock is being carried over the dies. The open position of the latch is illustrated in Fig. 5 and the closed position holding a piece of stock is illustrated in Fig. 6. As the carrier returns, after having been relieved of the stock, the finger engages the wedge point 36 of the latch 26 and is again opened, Figs. 9, 11.

After the carrier has transferred the severed piece of stock from a position at right angles to the axes of the punches and dies to a position parallel to the punches and dies, fingers 37 attached to a vertically movable slide 38 descend, grasp the stock, raise it from the carrier and then carry the stock down between the opened dies. The slide 38 is vertically movable in a frame 39 attached to the top of the machine bed. Extending through this vertically movable slide is the forked end- 40 of a lever 41 that is pivoted on an arbor 42 supported by the machine frame. The forked end of this lever carries a block 43 that has studs 44 which enter ears 45 that project from the front of the slide. The other end of the lever 41 is connected to a link 46 that is reciprocated from a suitable cam (not shown) for the purpose of moving the finger carrying slide up and down at the proper times, Figs. 1, 2, 8.

The severed piece of stock is deposited in the carrier preferably with its front end extending slightly further beyond the front of the carrier than its rear end extends beyond the rear of the carrier. Adjustably fastened to the machine frame in the path of the stock is a cam 47, Fig. 1, which is so adjusted that as the stock is carried around its front end will engage with the cam (Fig. 4) and be pushed thereby back and located in the carrier in an exact position for the fingers to pick it up and take it down into correct'position between the dies.

The transfer mechanism which is the subject of the instant invention is more especially designed for application to the common double end,

double stroke, open die header, that isyaheader which has dies that are opened for receiving and closed for holding stock, and which has sets of punches that are reciprocated' toward and from opposite ends of the machine and that in connection with the dies first enlarge the ends of the stock and then give final shape to the ends of the stock. The dies 48 of ordinary shape are held i die blocks 49 located the usual die pocket in the frame, and they may be opened and closed at the proper times by toggle and spring controlling means, such for example as is illustrated in patent to Praeny No. 1,804,029. The punches 50 are mounted in punch holders 51 which may be reciprocated from and toward opposite ends of the machine by eccentrics (Campbell Patent No; 569,406), or by cranks (Brennan Patent No. 1,108,426), or by cams (Bauck Patent No. 1,711,630), and the punches may be raised and lowered for giving the double blow by such transfer mechanism as is illustrated in patent to Gaess No. 1,372,132. The punch and die actuating mechanisms being well known and not forming a part of the present invention are not set forth in detail.

By the mechanisms described the stock is fed in from the side of the machine, a length is severed and deposited on a carrier, and when held thereon the carrier is swung horizontally so as to carry the stock 90 degrees from a position at right angles to the axes of the punches and dies to par-,.

allel with the punches and dies. As the stock is transferred by the carrier it is located by the fixed cam in exact position and then the fingers descend, pick the stock from the carrier and 'while thecarrier returns, take the stock down between the dies which are then closed, and as the fingers are raised the punches strike the op posite ends of the stock held by the dies and form the desired shapes of the ends.

The invention claimed is:

1. In a heading machine having dies and mechanism for opening and closing the dies and having punches and mechanism for reciprocating the punches toward and from the opposite ends of the dies, means for feeding stock into the machine, means for severing length of fed stock and depositing it on a rota carrier located below the cutter, means for rotating said carrier in a horizontal plane and transporting the severed stock from below the cutter into a position above and parallel with the line of punch movements, means for centralizing the stock on said carrier as the carrier is rotated, and mechanism for picking the stock from said carrier and depositing it between the dies.

2. In a heading machine having dies and mechanism for opening and closing the dies and havcam adapted to engage the end of the stock as it. is transported by the carrier for centralizing it over the dies, and mechanism for picking the stock from said carrier and depositing it between the dies. I

3. In a heading machine having dies and mechanism for opening and closing the dies and having punches and mechanism for reciprocating the punches toward and from the opposite ends of the dies, means for depositing stock on a rotary carrier, means for rotating said carrier in a horizontal plane and transporting the stock into a posi tion parallel with the line of punch movements, a cam adapted to be engaged by the forward end of the stock transported by the carrier for centralizing it over the dies, and mechanism for picking the stock from said carrier and depositing it between the dies.

4. In a heading machine having dies and mechanism for opening and closing the dies and hav- 8 ing punches and mechanism for reciprocating the punches toward and from the opposite ends of the dies, means for depositing stock on a rotary carrier, means for rotating said carrier in a horizontal plane and transporting the stock from angular relation to, into a position parallel with the line of punch movements, means for retaining the stock on the carrier as it is transported horizontally, means adapted to engage the end of the stock as it is transported by the carrier for centralizing it over the dies, and mechanism for removing the stock from said carrier and depositing it between the dies.

5. In a heading machine having dies and mechanism for opening and closing the dies and having punches and mechanism for reciprocating the punches toward and from the opposite ends of the dies, a rotary carrier, means for rotating said carrier in a horizontal plane, a cam for centralizing stock on the carrier as the carrier is rotated, and vertically reciprocating fingers for picking stock from said carrier and depositing it between the dies.

6. In a heading machine having punches and dies, means for feeding stock, means for severing lengths of fed stock, a rotary carrier for receiving the severed stock, means for rotating said car-1 rier ninety degrees in a horizontal plane, a cam for centralizing the stock on the carrier as it is rotated, and vertically reciprocating fingers for picking stock from said carrier and depositing it between the dies.

7. In a heading machine having dies and mechanism for opening and closing the dies and punches movable toward and from the opposite ends of the dies, means for feeding stock into the side of the machine in a direction transverse to the line of movement of the punches, a cutter for severing a length of fed stock and depositing it on a carrier, said carrier being rotatably mounted on a vertical axis and having a recess below the cutter for receiving the severed piece of stock, means for oscillating said carrier in a horizontal plane and transporting the stock deposited in said recess from below the cutter into a position above and parallel with the line of punch movements, and mechanism for picking the stock from said carrier recess and depositing it between the dies.

8. In a heading machine having dies and mechanismforopeningandclosingthediesand punches movable toward and from the opposite ends of the dies, mean for feeding stock into the side of the machine in a direction transverse to the line of movement of the punches, a cutter for severing a length of fed stock and depositing it on a carrier, said carrier, being rotatably mounted on a vertical axis and having a recess below the cutter for receiving the severed piece of stock, means for retaining the stock in said recess while the carrier is moved, means for oscillating said carrier in a horizontal plane and transporting the stock deposited in said recess from below the cutter into a position above and parallel with the line of punch movements, and for pickng the stock from said carrier recess and depositing it between the dies.

9. In a heading machine having dies and mechanism for opening and closing the dies and punches movable toward and from the opposite ends of the dies, means for feeding stock into the side of the machine in a direction transverse to the line of movement of the punches, a cutter for severing a length of fed stock and depositing it on a carrier, said carrier being rotatably mountedonaverticalaxisandhavingarecessbelowthe cutter for receiving the severed piece of stock, means for retaining the stock in said reces, said means being actuated by the movement of the cutter to permit the stock to be deposited in the recess, means for oscillating said carrier in a horizontal plane and transporting the stock deposited in said recess irom below the cutter into a position above and parallel with the line of punch movements, and mechanism for picking the stock from said carrier recess and depositing it between the dies.

10. In a heading machine having dies and mechanism for opening and closing the dies and punches movable toward and from the opposite ends of the dies, means for feeding stock into the side of the machine in a direction transverse to the line of movement of the punches, a cutter for severing a length of fed stock, a carrier rotatably mounted on a vertical axis, said carrier having a recess below the cutter for receiving the severed piece of stock, means for retaining the stock in said recess while the carrier is moved, and means for oscillating said carrier in a horizontal plane and transporting the stock deposited in said recess from below the cutter into a position above and parallel with the line of punch movements.

JOHN E. PRACNY.

III 

